How to get desired Instagram username

On one of my instagram profiles I had to use "username1" because just "username" was already in use. Now after few months there is no profile with just "username", I guess that he got banned or deleted profile.

This is what I see when I go to instagram.com/username

But when I try to change my username to "username" I get error that it is not available.

Is there any solution to my situation? How can I get desired username?

You can't get that username if it was banned, sorry.

I’m not sure how you can get it. But that account might got a phone verification or got banned that’s how accounts dissapears and you can’t use it’s username